TY - JOUR
T1 - Effect of transition metal on catalytic graphitization of ordered mesoporous carbon and Pt/metal oxide synergistic electrocatalytic performance
AU - Tang, Jing
AU - Wang, Tao
AU - Sun, Xin
AU - Guo, Yunxia
AU - Xue, Hairong
AU - Guo, Hu
AU - Liu, Mingzhu
AU - Zhang, Xiaoxue
AU - He, Jianping
PY - 2013
Y1 - 2013
N2 - The catalytic graphitization effect of transition metal W, Mo or Ti compounds on ordered mesoporous carbon and Pt/WOx synergistic electrocatalytic performance for methanol oxidation are investigated. Two-dimensional highly ordered and partially graphitized metal-containing mesoporous carbon materials (Me-OMC) are directly synthesized by using resol as the carbon precursor, triblock copolymer Pluronic F127 as template agent and metal salts (H6O41SiW12, (NH4) 6Mo7O24 or Ti(OC4H9) 4) as additives. During the heat treatment, metallic salts are converted to metal compound nanoparticles by carbothermal reduction and situ catalyze carbon graphitization. TEM and BET demonstrate that metal compound nanoparticles uniformly embed in carbon matrix and hardly affect the ordered mesoporous structure. In addition, Pt catalysts supported on W-OMC composites show an excellent electrocatalytic performance and much better CO tolerance ability for methanol oxidation, which probably contribute to synergistic catalysis between Pt and WOx. The practical electrochemical active surface area of Pt/W-OMC for hydrogen oxidation in H2SO4 solution is 148.0 m2 g-1, 4.1 times as high as that of Pt/OMC.
AB - The catalytic graphitization effect of transition metal W, Mo or Ti compounds on ordered mesoporous carbon and Pt/WOx synergistic electrocatalytic performance for methanol oxidation are investigated. Two-dimensional highly ordered and partially graphitized metal-containing mesoporous carbon materials (Me-OMC) are directly synthesized by using resol as the carbon precursor, triblock copolymer Pluronic F127 as template agent and metal salts (H6O41SiW12, (NH4) 6Mo7O24 or Ti(OC4H9) 4) as additives. During the heat treatment, metallic salts are converted to metal compound nanoparticles by carbothermal reduction and situ catalyze carbon graphitization. TEM and BET demonstrate that metal compound nanoparticles uniformly embed in carbon matrix and hardly affect the ordered mesoporous structure. In addition, Pt catalysts supported on W-OMC composites show an excellent electrocatalytic performance and much better CO tolerance ability for methanol oxidation, which probably contribute to synergistic catalysis between Pt and WOx. The practical electrochemical active surface area of Pt/W-OMC for hydrogen oxidation in H2SO4 solution is 148.0 m2 g-1, 4.1 times as high as that of Pt/OMC.
KW - Catalyze graphitization
KW - Electrocatalytic activity
KW - Metal salts
KW - Ordered mesoporous carbon
UR - https://www.scopus.com/pages/publications/84878352297
U2 - 10.1016/j.micromeso.2013.04.027
DO - 10.1016/j.micromeso.2013.04.027
M3 - 文章
AN - SCOPUS:84878352297
SN - 1387-1811
VL - 177
SP - 105
EP - 112
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
ER -